Electronic pen stylus

Abstract

Provided is an electronic pen stylus including a front-end part which, in operation, comes into contact with a position pointing input surface, and a rod-shaped axial center part formed integrally with the front-end part, in which at least the front-end part is made of a filler-mixed resin of which a base resin is mixed with a fibrous material as the filler having a hardness that is higher than a hardness of the base resin.

What is claimed is: 
     
       1. An electronic pen stylus comprising:
 a front-end part which, in operation, comes into contact with a position pointing input surface; and 
 a rod-shaped axial center part formed integrally with the front-end part, 
 wherein at least the front-end part is made of a filler-mixed resin of which a base resin is mixed with a fibrous material as a filler having a hardness that is harder than a hardness of the base resin, 
 wherein both the front-end part and the axial center part are made of the filler-mixed resin, 
 wherein the fibrous material in the front-end part is higher in density than in the axial center part, and 
 wherein the axial center part is thinner than the front-end part. 
 
     
     
       2. The electronic pen stylus according to  claim 1 , wherein a fiber length of the fibrous material is less than a thickness of the front-end part and a thickness of the axial center part. 
     
     
       3. The electronic pen stylus according to  claim 2 , wherein a lengthwise direction of the fibrous material in the front-end part is oblique along a contour of a tip surface of the front-end part. 
     
     
       4. The electronic pen stylus according to  claim 1 , wherein the hardness of the fibrous material is lower than a hardness of glass fiber or carbon fiber. 
     
     
       5. The electronic pen stylus according to  claim 4 , wherein the fibrous material is poly-paraphenylene terephthalamide fiber. 
     
     
       6. The electronic pen stylus according to  claim 1 , wherein, in operation, the base resin is worn off by friction between the front-end part and the position pointing input surface. 
     
     
       7. The electronic pen stylus according to  claim 1 , wherein the fibrous material is made of a material having a tensile strength that is higher than a tensile strength the base resin. 
     
     
       8. The electronic pen stylus according to  claim 1 , wherein the axial center part is covered with an outer coat made of a material having a hardness that is higher than the hardness of the base resin.